{"id":"CVE-2021-34520","aliases":["EUVD-2021-21174","GHSA-hr4m-jq9r-c4gx"],"status":"published","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Microsoft SharePoint Server Remote Code Execution Vulnerability","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.04425,"percentile":0.91484,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-502"],"published":"2021-07-14T17:54:35Z","modified":"2026-08-10T18:31:47Z","products":[{"vendor":"microsoft","product":"microsoft sharepoint enterprise server 2016"},{"vendor":"microsoft","product":"microsoft sharepoint foundation 2013 service pack 1"},{"vendor":"microsoft","product":"microsoft sharepoint server 2019"},{"vendor":"microsoft","product":"sharepoint_foundation"},{"vendor":"microsoft","product":"sharepoint_server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34520","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34520","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-828/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34520"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-828"},{"url":"https://github.com/advisories/GHSA-hr4m-jq9r-c4gx"}],"sources":{"cve":[{"id":"CVE-2021-34520","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability","description":"Microsoft SharePoint Server Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T17:54:35Z","modified":"2026-08-10T15:11:19.823Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21174","description":"Microsoft SharePoint Server Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T17:54:35Z","modified":"2026-08-10T15:11:19Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:04.543433Z"}],"ghsa":[{"id":"GHSA-hr4m-jq9r-c4gx","title":"Microsoft SharePoint Server Remote Code Execution Vulnerability This CVE ID is unique from CVE...","description":"Microsoft SharePoint Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34467, CVE-2021-34468.","status":"published","published":"2022-05-24T19:07:48Z","modified":"2026-08-10T18:31:47Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:10:15.270288Z"}],"nvd":[{"id":"CVE-2021-34520","description":"Microsoft SharePoint Server Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T18:15:12.257Z","modified":"2026-08-10T16:17:56.473Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}